if we have four more years of obama, if obamacare is not repealed we'll have story after story of that one. >> senator rubio is here shadowing the president. he told me he agrees with governor chris christie that romney is a strong debate torso they're still not low -- strong debater, so they are still not lowering the expectation. the message is simple: the country can't afford four more months, let alone four more years. >> bret: ed henry traveling with the president in las vegas. thank you. one thing you can just about guarantee to hear wednesday night here is reference to mitt romney's comment on that videotape about the now infamous 47%. chief political correspondent carl cameron has that story and the rest of the debate prep from here in denver. >> day before facing off with president obama in denver, romney attended staff meetings and stepped out for mexican fast food with the ohio senator rob portman, the man playing the president in the mock debate rehearsals. his wife ann hit the trail in his stead. >> we're focused and i can't wait for the contrast we're going to hear tomorr